I'm the same way Ozzy. I'm a all or none kinda guy, and hate buyers remorse. When I first got into the predator game I was carrying my 20" DPMS Panther and ended up buying a bolt gun that was nice and light for carrying a few miles a day. After a few months with that, I ended up splurging on a R-15, and I'm more than happy with it. I sold the DPMS since I wasn't using it much anymore, and haven't looked back. The good thing about the AR platform is that you can always upgrade/swap parts down the road, and the Lo-Pro is a good start for that. You could throw a ACE skeleton stock on it, and a light weight free float tube and have a great little rig, not to mention for that price range, you can't feel too horrible for taking some krylon to it.
For the few hundred dollars more your paying if you go with the Sweet 16, I'd look into a R-15 or RRA Coyote. This is all assuming you're looking for a new dedicated calling rig though, as the Sweet 16 isn't much different of a gun than the lo-pro, minus the stainless barrel, dust cover and forward assist. Either way, any of the above mentioned AR's are great little guns that will more than suffice! Let us know what you end up getting, we all love a little eye candy!
(hooray for my 100th post!) /ubbthreads/images/graemlins/smile.gif